Details about the topic that convince the reader to look at your point of view.
I believe the answer is: B. To show that Grendel cannot rely on nature for protection
In the story, Grendel perceive that he is blessed by protection from the nature which would always help him in all of his troubles. But when he somehow got his foot stucked in a tree in front of a bull and when he cried and scream for help from the nature, he did not receive any answer.
The priests are telling their parishioners to withdraw their support for Parnell because of his immoral behavior. Mr. Dedalus and Mr. Casey both object to priests interfering in politics. Dante defends the priests because she thinks it is their job to direct the people away from immorality.
